<?php
namespace x\my;
class Curl
{
    //创建连接
    public static function create(){
       $ch = null;
       if(!function_exists('curl_init')){
           return false;
       }
       $ch = curl_init();
       if(!is_resource($ch)){
           return false;
       }
       return $ch;
    }
    //执行
    public static function execute($method, $url, $fields='', $userAgent='', $httpHeaders='', $username='', $password=''){
        $ch = Curl::create();
        if(false === $ch){
            return false;
        }
        if(is_string($url) && strlen($url)){
            $ret = curl_setopt($ch, CURLOPT_URL, $url);
        }else{
            return false;
        }
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);#跳过ssl检查
        curl_setopt($ch, CURLOPT_HEADER, false);        #是否显示头部信息
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        if($username != ''){
            curl_setopt($ch, CURLOPT_USERPWD, $username . ':' . $password);
        }
        $method = strtolower($method);
        if('post' == $method){
            curl_setopt($ch, CURLOPT_POST, true);
            if(is_array($fields)){
                $fields = build_query($fields);
                // $sets = array();
                // foreach ($fields AS $key => $val){
                //  $sets[] = $key . '=' . urlencode($val);
                // }
                // $fields = implode('&',$sets);
            }
            curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
            }else if('put' == $method){
                curl_setopt($ch, CURLOPT_PUT, true);
            }
            //curl_setopt($ch, CURLOPT_PROGRESS, true);
            //curl_setopt($ch, CURLOPT_VERBOSE, true);
            //curl_setopt($ch, CURLOPT_MUTE, false);
            curl_setopt($ch, CURLOPT_TIMEOUT, 10);//设置curl超时秒数
            if(strlen($userAgent)){
                curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
            }
            if(is_array($httpHeaders)){
                curl_setopt($ch, CURLOPT_HTTPHEADER, $httpHeaders);
            }
            $ret = curl_exec($ch);
            if(curl_errno($ch)){
                $err = array(curl_error($ch), curl_errno($ch));
                curl_close($ch);
                return $err;
            }else{
                curl_close($ch);
            if(!is_string($ret) || !strlen($ret)){
                return false;
            }
            return $ret;
        }
    }
    //post提交
    public static function post($url, $fields, $userAgent = '', $httpHeaders = '', $username = '', $password = ''){
        $ret = Curl::execute('POST', $url, $fields, $userAgent, $httpHeaders, $username, $password);
        if(false === $ret){
            return false;
        }
        if(is_array($ret)){
            return false;
        }
        return $ret;
    }
    //get提交
    public static function get($url, $userAgent = '', $httpHeaders = '', $username = '', $password = ''){
        $ret = Curl::execute('GET', $url, '', $userAgent, $httpHeaders, $username, $password);
        if(false === $ret){
            return false;
        }
        if(is_array($ret)){
            return false;
        }
        return $ret;
    }
}
